排序方式: 共有55条查询结果,搜索用时 31 毫秒
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讨论了一类非线性薛定谔方程组无穷多解的存在性.在假设的V(x),b(x),f(x)条件下,通过减弱喷泉定理的条件,运用变形的喷泉定理,证明了相关方程组的无穷多解的存在性.较扰动方法更加简捷. 相似文献
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Gongming WEI 《数学年刊B辑(英文版)》2008,29(3):247-264
A 2-coupled nonlinear Schrbdinger equations with bounded varying potentials and strongly attractive interactions is considered. When the attractive interaction is strong enough, the existence of a ground state for sufficiently small Planck constant is proved. As the Planck constant approaches zero, it is proved that one of the components concentrates at a minimum point of the ground state energy function which is defined in Section 4. 相似文献
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Di Niu Cong Wei Zheng Lu Yanyan Fang Bo Liu Da Sun Xiaobin Hao Hongge Pan Gongming Wang 《Molecules (Basel, Switzerland)》2021,26(8)
The electrochemical carbon dioxide reduction reaction (CO2RR) to C2 chemicals has received great attention. Here, we report the cuprous oxide (Cu2O) nanocubes cooperated with silver (Ag) nanoparticles via the replacement reaction for a synergetic CO2RR. The Cu2O-Ag tandem catalyst exhibits an impressive Faradaic efficiency (FE) of 72.85% for C2 products with a partial current density of 243.32 mA·cm−2. The electrochemical experiments and density functional theory (DFT) calculations reveal that the introduction of Ag improves the intermediate CO concentration on the catalyst surface and meanwhile reduces the C-C coupling reaction barrier energy, which is favorable for the synthesis of C2 products. 相似文献
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Lu X Wang G Xie S Shi J Li W Tong Y Li Y 《Chemical communications (Cambridge, England)》2012,48(62):7717-7719
Hydrogenated ZnO nanorod arrays (NRAs) grown on F-doped SnO(2) (FTO) glass substrates yield a benchmark specific hydrogen production rate of 122,500 μmol h(-1) g(-1), and exhibit excellent stability and recyclability. 相似文献
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Xianyin Song Wenqing Li Xiaojing Liu Yishang Wu Dong He Zunjian Ke Li Cheng Changzhong Jiang Gongming Wang Xiangheng Xiao Yat Li 《Journal of Energy Chemistry》2021,(4):154-161
Although computational studies have demonstrated that metal ion doping can effectively narrow the bandgap of TiO2,the visible-light photoactivity of metal-doped TiO2 photoanodes is still far from satisfactory.Herein,we report an effective strategy to activate the visible-light photoactivity of chromiumimplanted TiO2 via the incorporation of oxygen vacancies.The chromium-doped TiO2 activated by oxygen vacancies(Cr-TiO2-vac)exhibited an incident photon-to-electron conversion efficiency(IPCE)of~6.8%at450 nm,which is one of the best values reported for metal-doped TiO2.Moreover,Cr-TiO2-vac showed no obvious photocurrent decay after 100 h under visible-light illumination. 相似文献
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C60和C70混合物甲苯溶液的吸收光谱及荧光光谱研究 总被引:1,自引:0,他引:1
测量了C_(60)和C_(70)混合物甲苯溶液的吸收光谱和荧光光谱.采用调QYAG激光器输出的倍频光(532nm)作为激发光,在670nm和695nm附近测量到了C_(60)和C_(70)混合物甲苯溶液的两个荧光峰,这些荧光峰有可能是由C_(70)分子产生的. 相似文献